Sight distance at intersections

At intersections where two or more roads meet, visibility should be provided for the drivers approaching the intersection from either sides. They should be able to perceive a hazard and stop the vehicle if required. Stopping sight distance for each road can be computed from the design speed. The sight distance should be provided such that the drivers on either side should be able to see each other. This is illustrated in the figure 1.

**Figure 1:** Sight distance at intersections
$\begin{figure}\centerline{\epsfig{file=../../../figeps/g24-intersection-set-back-concept.eps,width=7cm}}% \end{figure}$

Design of sight distance at intersections may be used on three possible conditions:

Enabling approaching vehicle to change the speed
Enabling approaching vehicle to stop
Enabling stopped vehicle to cross a main road